wow... you might need a family tree diagram to keep track of those connections. Sounds like a bunch of people just being open about who their friends are and what the nature of their relationship is.

I always laugh when I see a television show with a court room and the lawyer asks the witness, "what is the nature of your relationship with the defendant?"

It would be funny if the witness answered, "Well he's my wife's girlfriend's lover, but sometimes my sister's brother and me are also intimate with him because he's bisexual. ...But we're all very good friends. "

Between my boyfriend and his spouse, and her boyfriend, we call ourselves a family. Which suddenly sounds so quaint.

On the other hand, our friend group has the thing going on like what RP calls the Spread. OSO and I call it the Cesspool.... in a loving way, of course.